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> City Bikes Special Order Catalog > Components > Shifter > Electronic Shifter Parts, Shimano > Junction Box > Shimano JC41 Di2 Internal Frame Junction Box 4-Port


JC41 Di2 Internal Frame Junction Box 4-Port (CY6762)

  • Currently, we do not ship because mail order might interfere with giving our instore customers the best possible customer service. Sorry!
Shimano Di2 Frame Junction Box
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from
  • Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear deailleur, cockpit junction box and battery mount